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To aid navigation, this map shows small islands, shoals and reefs, maritime routes for use during monsoons or at particular times of the year, bathymetry (sea depth), past explorers’ routes, shipwrecks and text about monsoons, typhoons and currents.

Map focusing on the passages between the islands of maritime Southeast Asia. Many 18th century routes are labelled with the ship/captain’s name and date, and there are notes on some shoals and reefs recording names, details and incidents/shipwrecks.

Map focusing on the passages between the islands of maritime Southeast Asia. Many 18th century routes are labelled with the ship/captain’s name and date, and there are notes on some shoals and reefs recording names, details and incidents/shipwrecks.

Map of the Bay of Bengal, with the western coast of mainland Southeast Asia. Shoals, reefs and islands are marked. The web of lines is a rhumbline network, while the numbers indicate sea depth (bathymetry), both used to aid navigation.

Map of the Bay of Bengal, with the western coast of mainland Southeast Asia. Shoals, reefs and islands are marked. The web of lines is a rhumbline network, while the numbers indicate sea depth (bathymetry), both used to aid navigation.

This map of the Eastern Hemisphere was designed to show maritime routes from the Netherlands to Southeast Asia. It shows New Guinea (‘Nieuw Guinee’) and Australia (‘Nieuw Hollande’) as one landmass, connected via an area labelled ‘Karpentarie’.

This map of the Eastern Hemisphere was designed to show maritime routes from the Netherlands to Southeast Asia. It shows New Guinea (‘Nieuw Guinee’) and Australia (‘Nieuw Hollande’) as one landmass, connected via an area labelled ‘Karpentarie’.

This map of the Eastern Hemisphere was designed to show maritime routes from the Netherlands to Southeast Asia. It shows New Guinea (‘Nieuw Guinee’) and Australia (‘Nieuw Hollande’) as one landmass, connected via an area labelled ‘Karpentarie’.

This map of the Eastern Hemisphere was designed to show maritime routes from the Netherlands to Southeast Asia. It shows New Guinea (‘Nieuw Guinee’) and Australia (‘Nieuw Hollande’) as one landmass, connected via an area labelled ‘Karpentarie’.

This map of the Eastern Hemisphere was designed to show maritime routes from the Netherlands to Southeast Asia. It shows New Guinea (‘Nieuw Guinee’) and Australia (‘Nieuw Hollande’) as one landmass, connected via an area labelled ‘Karpentarie’.

This map of the Eastern Hemisphere (Asia, Europe, Africa) shows New Guinea (‘Nouvelle Guinee’) and Australia (‘Nouvelle Hollande’) as one landmass, demonstrating that there was some uncertainty about the area’s geography in the early 18th century.